Bump the LLVM/clang version to 13.0
The LLVM/clang 13.0 has been released and it fixes some clang-format issues that I've been seeing with clang-format-12. This needs to be done post-release.
The LLVM/clang 13.0 has been released and it fixes some clang-format issues that I've been seeing with clang-format-12. This needs to be done post-release.